May weather forecast
Exton, PA

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Weather in May

In Exton, May welcomes warmer weather with temperatures dancing between 53.6°F (12°C) and 71.1°F (21.7°C). This is the first month of the year that experiences no snowfall, demonstrating a solid transition from spring to summer. Lengthy days with a greater sunlight duration become the monthly highlight. Though the rainfall levels hit an annual high with 1.38" (35mm), the increased sunlit hours manage to balance the dampness, making it an agreeable month overall. May heralds summer with an appreciable escalation in warmth and sunshine.

Temperature

As May sets, the average high-temperature shows an increase, moving up from a mild 60.6°F (15.9°C) in April to a pleasant 71.1°F (21.7°C). Exton experiences a consistent average temperature of 53.6°F (12°C) throughout the nights in May.

Humidity

In Exton, the average relative humidity in May is 77%.

Rainfall

In May, in Exton, the rain falls for 13.7 days. Throughout May, 1.38" (35mm) of precipitation is accumulated. In Exton, during the entire year, the rain falls for 124.6 days and collects up to 14.25" (362mm) of precipitation.

Snowfall

Months with snowfall in Exton, Pennsylvania, are January through May, November and December. May is the last month it regularly snows in Exton. During 0.2 snowfall days, in May, Exton aggregates 0.16" (4mm) of snow. Throughout the year, in Exton, Pennsylvania, there are 18.5 snowfall days, and 5.51" (140mm) of snow is accumulated.

Daylight

In Exton, the average length of the day in May is 14h and 25min.
On the first day of the month, sunrise is at 6:01 am and sunset at 7:57 pm. On the last day of May, in Exton, sunrise is at 5:35 am and sunset at 8:24 pm EDT.

Sunshine

The average sunshine in May in Exton is 8.2h.

UV index

The months with the highest UV index in Exton, Pennsylvania, are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: An average UV index of 6 in May transforms into this advice:
Shun overexposure. Protection from sun ravages is indispensable. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Enhance your sun protection with tightly woven, yet airy clothing. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
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Frequently asked questions

What are the temperatures in Exton in May?

An average high-temperature, in May, in Exton, is 71.1°F (21.7°C) and the average low-temperature is 53.6°F (12°C).

What is the average humidity in May in Exton?

In Exton, Pennsylvania, the average relative humidity in May is 77%.

How many days does it rain in May in Exton?

In Exton, in May, during 13.7 rainfall days, 1.38" (35mm) of precipitation is typically accumulated.

What is the last month it snows in Exton?

May is the last month it regularly snows in Exton, Pennsylvania. During 0.2 snowfall days, in May, Exton aggregates 0.16" (4mm) of snow.

What is the average length of the day in May in Exton?

The average day length in May in Exton, Pennsylvania, is 14h and 25min.

What time are sunrise and sunset in May in Exton?

In May, on the first day of the month, sunrise is at 6:01 am and sunset at 7:57 pm. On the last day of the month, in Exton, Pennsylvania, sunrise is at 5:35 am and sunset at 8:24 pm EDT.

How long on average sun shines in May in Exton?

The average sunshine duration in May in Exton, Pennsylvania, is 8.2h.

What are the months with the highest UV index in Exton?

The months with the highest UV index in Exton, Pennsylvania, are May through August, with an average maximum UV index of 6.

What is the UV index reading in May in Exton?

In May, the average daily maximum UV index in Exton is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Exton, PA

Average temperature in May - Exton, PA
  • Average high temperature in May: 71.1°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (36.1°F).

  • Average low temperature in May: 53.6°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

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Average pressure in May
Exton, PA

Average pressure in May - Exton, PA
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in May
Exton, PA

Average wind speed in May - Exton, PA
  • Average wind speed in May: 6.6mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in May
Exton, PA

Average humidity in May - Exton, PA
  • Average humidity in May: 77%

The months with the highest relative humidity are February and October (79%).
The months with the lowest relative humidity are April and July (73%).

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Average rainfall in May
Exton, PA

Average rainfall in May - Exton, PA
  • Average rainfall in May: 1.38"

The wettest month (with the highest rainfall) is August (1.89").
The driest month (with the least rainfall) is January (0.79").

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Average rainfall days in May
Exton, PA

Average rainfall days in May - Exton, PA
  • Average rainfall days in May: 13.7 days

The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is January (5 days).

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Average snowfall in May
Exton, PA

Average snowfall in May - Exton, PA
  • Average snowfall in May: 0.16"

The month with the highest snowfall is March (1.57").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in May
Exton, PA

Average snowfall days in May - Exton, PA
  • Average snowfall days in May: 0.2 days

The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Exton, PA

Average daylight in May / Average sunshine in May - Exton, PA
  • Average daylight in May: 14h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in May: 8h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

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Average sunshine days in May
Exton, PA

Average sunshine days in May - Exton, PA
  • Average sunshine days in May: 14.4 days

The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is June (13.3 days).

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Average UV index in May
Exton, PA

Average UV index in May - Exton, PA
  • Average UV index in May: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in May
Exton, PA

Average cloud cover in May - Exton, PA
  • Average cloud cover in May: 49

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 33).

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Average visibility in May
Exton, PA

Average visibility in May - Exton, PA
  • Average visibility in May: 5mi

The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).

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Exton, Pennsylvania, USA

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